My Inquiry
My Account
Renesas IDT74FST163244PAG8
- Part No.:
- IDT74FST163244PAG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
IDT74FST163244PAG8.pdf
- Description:
- IC BUS SWITCH 4 X 1:1 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,909
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IDT74FST163244 from Integrated Device Technology is a 16-bit bus switch IC with TTL-compatible I/O, 5Ω typical on-resistance at VCC = 4.5V, 0.25ns propagation delay, and industrial temperature range (–40°C to +85°C). It provides zero-delay bidirectional signal routing between A- and B-port buses in memory expansion, data multiplexing, and hot-swap backplane interfaces.
For engineers reviewing the IDT74FST163244 datasheet, IDT74FST163244 pinout, IDT74FST163244 application, or IDT74FST163244 equivalent, key selection criteria include low RON for minimal signal distortion, hot-insertion capability without VCC sequencing, ESD robustness (>2000V HBM), and TSSOP-48 package compatibility with high-density PCB layouts.
Technical Context
The IDT74FST163244 implements 16 independent n-channel FET switches, each controlled by an active-low output enable (xOE) signal. Each switch connects corresponding A- and B-port pins only when its xOE is LOW; no internal current sinking or sourcing is provided - external drivers must supply all signal current.
It operates exclusively at VCC = 5.0V ±10% with guaranteed logic thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V), supports hot insertion with VCC = 0V, and exhibits negligible dynamic power consumption (ICCD ≤ 160µA/MHz per toggling enable) due to capacitive-only switching behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch On Resistance (RON) | 5Ω typical at VCC = 4.5V, VIN = 0V - ensures minimal voltage drop and signal attenuation across connected paths |
| Propagation Delay (tPLH/tPHL) | 0.25ns max - delivers near-zero delay signal pass-through, critical for high-speed bus isolation |
| Input/Output Capacitance (CI/O) | 12pF (switch off) - limits loading on driving sources and preserves signal edge integrity |
| ESD Rating | >2000V HBM (MIL-STD-883 Method 3015) - enables robust handling during board assembly and field service |
| Operating Temperature | –40°C to +85°C - validated for industrial control, telecom infrastructure, and embedded computing environments |
| Supply Voltage Range | 4.5V to 5.5V - compatible with standard 5V TTL and CMOS logic rails without level translation |
| Hot Insertion Support | Yes, with VCC = 0V - allows live insertion into powered backplanes without damaging upstream drivers |
Pinout & Package
TSSOP-48 package: 12.5mm × 6.1mm body, 0.5mm pitch, exposed pad not electrically connected. Pin count: 48 terminals, arranged in two rows (24 per side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-Low Output Enable Inputs | Four independent controls, each enabling 4-bit A↔B switch group - enables granular bus segmentation |
| 1A1–4A4, 1B1–4B4 | Switch Port Terminals (A and B) | 16 bidirectional pairs; A-side and B-side are functionally identical - no directionality or driver dependency |
| VCC (Pins 39, 40, 47, 48) | Power Supply | Four dedicated VCC pins reduce IR drop and improve noise immunity across high-speed switching |
| GND (Pins 1, 2, 11, 12, 21, 22, 31, 32) | Ground Reference | Eight GND pins provide low-inductance return paths for all 16 switch channels and control inputs |
Key Features
| Feature | Design Value |
|---|---|
| Zero-delay signal path | Propagation delay ≤ 0.25ns - eliminates timing budget overhead in synchronous bus architectures |
| Low on-resistance | 5Ω typical RON - maintains signal fidelity up to 100MHz without termination or equalization |
| TTL-compatible I/O | VIH ≥ 2.0V, VIL ≤ 0.8V - interoperates directly with legacy 5V microcontrollers and ASICs |
| Hot insertion support | Functional with VCC = 0V - enables safe replacement in live telecom line cards and server backplanes |
| Low dynamic power | ICCD ≤ 160µA/MHz per enable - reduces thermal load in dense FPGA I/O expansion modules |
Applications
| Memory Expansion Interface | Data Multiplexing |
|---|---|
Use Scenario: Expanding address/data bus width between a microcontroller and multiple SRAM banks using time-multiplexed access. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating inactive memory banks to prevent contention and leakage. Use Value: Enables single-controller access to 4× 16-bit memory banks with <0.25ns added delay and no additional timing margin required. | Use Scenario: Sharing a single 16-bit ADC output bus among four FPGA processing units via time-sliced sampling. IC Role / Device Role / Timing Role: Signal routing switch selecting one of four B-port outputs to a common A-port data path. Use Value: Eliminates need for discrete analog switches or complex FPGA I/O routing; supports 100MHz sample clock domain crossing. |
| Hot-Swap Backplane | Logic Level Translation Bridge |
Use Scenario: Inserting/replacing I/O mezzanine cards in a powered 5V backplane without disrupting system operation. IC Role / Device Role / Timing Role: Isolation switch placed between backplane bus and card-local logic, enabled only after power stabilization. Use Value: Prevents bus contention and ground bounce during card insertion; validated for >2000V HBM ESD survival. | Use Scenario: Interfacing a 5V legacy peripheral to a 3.3V FPGA I/O bank where level shifters introduce unacceptable delay. IC Role / Device Role / Timing Role: Passive resistive bridge replacing active translators - relies on TTL input thresholds and low RON. Use Value: Achieves sub-0.3ns delay and <10mV offset across full 16-bit bus, avoiding setup/hold violations in high-speed parallel interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT16244ATPWR | Higher RON (15Ω typ), higher ICC (3mA max), same TSSOP-48 footprint | Designed for FCT-family timing compatibility; less suitable for ultra-low-distortion analog signal routing | Prefer when matching existing FCT logic family timing and drive strength |
| 74LVC16244APAG | 3.3V-only operation (1.65–3.6V), lower RON (4Ω typ), 1.8V-tolerant inputs | Not pin-compatible; requires level-shifting for 5V systems; optimized for low-voltage portable designs | Choose only for new 3.3V designs requiring lower power and smaller voltage margins |
Compared with SN74FCT16244ATPWR and 74LVC16244APAG, the IDT74FST163244 uniquely balances 5V TTL compatibility, 5Ω RON, and hot-insertion support - making it the only option qualified for industrial backplane isolation where zero-delay, ESD-hardened, and VCC-independent enablement are jointly required.
Availability
IDT74FST163244 is available at Aetrix Electronics and suitable for memory expansion interfaces, hot-swap backplanes, data multiplexing systems, and logic-level bridging applications requiring stable component supply and long-term industrial-grade availability.
Supply support for IDT74FST163244 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Integrated Device Technology, Inc. (IDT) is a U.S.-based semiconductor company specializing in timing, interface, and memory connectivity solutions for communications, computing, and industrial markets.
The IDT74FST163244 belongs to IDT's FST (Fast Switching Transistor) bus switch product line, engineered specifically for zero-delay, low-noise, hot-pluggable signal routing in 5V industrial systems - not general-purpose logic or level translation.
FAQ
What is the maximum continuous current rating per channel for the IDT74FST163244?
The IDT74FST163244 supports a maximum continuous channel current of 128mA per switch path, as specified in the Absolute Maximum Ratings table. This rating applies under industrial temperature conditions (–40°C to +85°C) and ensures reliable conduction without thermal runaway when used within VCC = 4.5V–5.5V and proper PCB thermal relief. Exceeding this current may degrade RON stability or accelerate wear-out.
Does the IDT74FST163244 require external pull-up or pull-down resistors on its control inputs?
No, the IDT74FST163244 does not require external biasing on its xOE inputs. Its TTL-compatible control inputs have guaranteed VIH ≥ 2.0V and VIL ≤ 0.8V, and input leakage is limited to ±1µA across temperature. Direct connection to 5V logic outputs suffices; adding pull resistors would unnecessarily increase power and risk violating input voltage thresholds during hot insertion.
Can the IDT74FST163244 be used in a 3.3V system?
The IDT74FST163244 is specified only for VCC = 4.5V to 5.5V operation and is not characterized for 3.3V use. Applying 3.3V violates the minimum supply requirement and results in undefined RON, timing, and logic threshold behavior. For 3.3V systems, consider the 74LVC16244APAG instead - but note it is not pin-compatible with the IDT74FST163244.
How does hot insertion work on the IDT74FST163244 without VCC applied?
Hot insertion works because the IDT74FST163244 uses n-channel FETs with gate control isolated from VCC. When VCC = 0V, all switches remain in high-impedance OFF state regardless of xOE state - preventing bus contention or latch-up. The device draws zero supply current and presents only 12pF capacitance per I/O, allowing safe mechanical insertion into live 5V backplanes before power-up sequencing begins.
Is the IDT74FST163244 pin-compatible with the FCT16244T as stated in the datasheet?
Yes, the IDT74FST163244 is explicitly documented as pin-compatible with the FCT16244T, sharing identical TSSOP-48 pinout, terminal assignments, and functional mapping (1OE–4OE, 1A1–4A4, 1B1–4B4). However, the IDT74FST163244 offers lower RON (5Ω vs. 15Ω typ), lower ICC, and enhanced hot-insertion capability - making it a performance upgrade while maintaining drop-in replacement feasibility in existing FCT16244T layouts.
IDT74FST163244PAG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74FST
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 4 x 1:1
- Independent Circuits:
- 4
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
IDT74FST163244PAG8 FAQ
1.How can I place an order for IDT74FST163244PAG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT74FST163244PAG8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for IDT74FST163244PAG8 reliable?
The price and inventory of IDT74FST163244PAG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT74FST163244PAG8 is usually 5 days.
3.What payment methods are accepted for IDT74FST163244PAG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT74FST163244PAG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT74FST163244PAG8?
IDT74FST163244PAG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT74FST163244PAG8 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for IDT74FST163244PAG8?
For technical support, including IDT74FST163244PAG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT74FST163244PAG8 requirements.
6.How does Aetrix verify that IDT74FST163244PAG8 is sourced from the original manufacturer or authorized distributors?
All IDT74FST163244PAG8 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IDT74FST163244PAG8 meets industry standards.
7.What is the process for return or replacement of IDT74FST163244PAG8?
All IDT74FST163244PAG8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT74FST163244PAG8, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The IDT74FST163244PAG8 part is unused and in its original packaging.
Return procedure for IDT74FST163244PAG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT74FST163244PAG8 Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
